Straight pipe works fine for me. And it was cheap. IIRC the benefits of a bigger exhaust aren't really seen until higher up in the RPMs anyway. So if your rev limiter is still stock, I'd just go with a straight pipe. Please correct me if I'm wrong.

 

i have a banks on mine but i made my own muffler delete and put a 6in silverline tip on it, that combined with efi live and the turbo vanes open on my tunes make it rumble like a bigblock chevy

 

You're making me want a Dmax...... dang college